CN107654591B - Multi-mode power-split hybrid transmission incorporating dual planetary gear sets - Google Patents
Multi-mode power-split hybrid transmission incorporating dual planetary gear sets Download PDFInfo
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- CN107654591B CN107654591B CN201710801301.8A CN201710801301A CN107654591B CN 107654591 B CN107654591 B CN 107654591B CN 201710801301 A CN201710801301 A CN 201710801301A CN 107654591 B CN107654591 B CN 107654591B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 55
- 239000000969 carrier Substances 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims description 14
- 230000005611 electricity Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/46—Gearings having only two central gears, connected by orbital gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
- F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of orbital gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2038—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with three engaging means
Abstract
The invention relates to a multi-mode power split hybrid transmission comprising a double planetary gear set for connecting an engine, a first electric machine and/or a second electric machine to an output shaft, respectively, comprising: double planet row: the first planet row comprises a first outer gear ring, a first sun gear, a first planet gear and a first planet carrier which are respectively meshed with the first outer gear ring and the first sun gear, and the second planet row comprises a second outer gear ring, a second sun gear, a second planet gear and a second planet carrier which are respectively meshed with the second outer gear ring and the second sun gear; a first clutch: one side of the first outer gear ring is connected with the first outer gear ring, and the other side of the first outer gear ring is connected with the second outer gear ring; an engine: is connected with the first sun gear; a first brake: the first sun gear is fixedly connected with a shell of the transmission and is controllably connected with the first sun gear; a second brake: and the gear box is fixedly connected with a shell of the transmission and is controllably connected with the second outer gear ring. Compared with the prior art, the invention has the advantages of lower mechanical complexity, low control difficulty, multi-mode and the like.
Description
Technical Field
The invention relates to the field of electromechanical hybrid vehicle drive, in particular to a multi-mode power split hybrid transmission comprising double planetary gear sets.
Background
Electromechanical hybrid vehicles typically include the use of an internal combustion engine and one or more motor/generators, power-split hybrid transmissions may be used in hybrid vehicles, allowing their use of different power sources under different operating conditions, and may be operated in different operating modes by controlling the engine and motor/generators as well as the combination of brakes and clutches, for example: the fuel economy can be improved in a pure electric drive mode, an input power split type continuously variable drive mode, a compound power split type continuously variable drive mode, a fixed ratio drive mode, and the like.
The power split hybrid transmission generally refers to a transmission device which splits power transmitted by an engine lock into two paths of mechanical and electrical paths for transmission through a differential gear device (usually adopting a planetary gear set), and finally performs confluence driving on an automobile. The power split hybrid power transmission can realize decoupling of an engine and a load, ensures that the engine works in a region with higher efficiency, fully utilizes the mechanical power flow transfer efficiency and has the advantage of high reliability. The fuel economy and the power performance of the vehicle can be greatly improved.
Chinese invention patent application No. 200780019214.1 discloses an electrically variable transmission mechanism including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to six selectable torque-transfer devices, and possibly a dog clutch. The selectable torque transfer devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse), at least four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode. The scheme supports a plurality of speed ratio modes, but uses excessive torque transmission mechanisms, so that the mechanical design scheme is complex, the cost is increased, and the control difficulty is increased.
Chinese invention patent application No. 201210070101.7, discloses a variable ratio power-split hybrid transmission having a technical solution including a first motor/generator having a first rotor connected for rotation with a first member of a first planetary gear set. A second motor/generator has a second rotor connected for common rotation with the second member of the first planetary gear set. The second member of the first planetary gear set is connected for common rotation with the output member. The first member of the second planetary gear set rotates with the input member and the third member of the second planetary gear set is grounded to the stationary member. A first torque transmitting mechanism establishes torque flow between the first member of the second planetary gear set and the third member of the first planetary gear set. The second torque transmission mechanism establishes torque flow between the second member of the second planetary gear set and the third member of the first planetary gear set, and the technical scheme provides that the first power-split operation mode and the second power-split operation mode are input power-split modes, when the vehicle runs at a low speed, the system driving efficiency is high, and when the vehicle enters high-speed driving, the system driving efficiency is low; in addition, in the second electric-only operating mode, all the shifting elements are in the engaged state, and when switching from the first electric-only operating mode to the second electric-only operating mode, the electric control complexity is high, and three shifting elements must be operated simultaneously. In the first electricity-only mode and the second electricity-only operation mode, the transmission ratio from the main driving motor to the output end is not changed, the second electricity-only mode is actually the power-assisted mode of the first electricity-only mode, and relatively speaking, the transmission of the pure electric driving mode is single, and the low-speed pure electric driving working condition may not be well met.
Chinese invention patent application No. 201010565450.7, discloses a three mode hybrid powertrain involving two motor/generators. A hybrid electro-mechanical transmission connectable with multiple power sources for launching and propelling a vehicle includes an output member and a stationary member. The transmission also includes a first planetary gear set having first, second and third nodes and a compound planetary gear arrangement having fourth, fifth, sixth and seventh nodes. The engine, the first motor/generator and the second motor/generator are each operatively connected with the first planetary gear set, and the output member and the second motor/generator are each operatively connected with the compound planetary gear arrangement. So configured, the transmission provides underdrive gear for launching the vehicle, as well as direct drive and overdrive gear for propelling the vehicle at higher speeds. The technical scheme adopts a planetary gear arrangement, and in an actual embodiment, the planetary gear set can be composed of two planetary gear sets or three planetary gear sets. The size, cost and control difficulty are all bigger.
Disclosure of Invention
It is an object of the present invention to overcome the above-mentioned deficiencies of the prior art by providing a multi-mode power-split hybrid transmission including dual planetary gear sets.
The purpose of the invention can be realized by the following technical scheme:
a multi-mode power-split hybrid transmission including dual planetary gear sets for connecting an engine, a first electric machine, and/or a second electric machine, respectively, to an output shaft, comprising:
double planet row: the planetary gear set comprises a first planetary row and a second planetary row, wherein the first planetary row comprises a first outer gear ring, a first sun gear, a first planetary gear and a first planet carrier which are respectively meshed with the first outer gear ring and the first sun gear, the second planetary row comprises a second outer gear ring, a second sun gear, a second planetary gear and a second planet carrier which are respectively meshed with the second outer gear ring and the second sun gear, the first planet carrier and the second planet carrier are fixedly connected to an output shaft of a transmission, a first motor is connected with the first outer gear ring, and a second motor is connected with the second sun gear;
a first clutch: one side of the first outer gear ring is connected with the first outer gear ring, and the other side of the first outer gear ring is connected with the second outer gear ring;
an engine: is connected with the first sun gear;
a first brake: the first sun gear is fixedly connected with a shell of the transmission and is controllably connected with the first sun gear;
a second brake: and the gear box is fixedly connected with a shell of the transmission and is controllably connected with the second outer gear ring.
The multi-mode power-split hybrid transmission includes the following operating modes:
pure electric mode: the second motor supplies power or the first motor and the second motor supply power together, and the first brake can adopt a one-way brake according to the requirement of the pure electric mode to drive the working condition capacity, so that the complexity of system electric control can be further reduced;
hybrid mode: the engine, the first motor and the second motor are powered together;
fixed ratio mode: the engine is powered individually or the engine and the second electric machine are powered together.
The pure electric mode comprises the following steps:
single motor pure electric mover mode: the second brake is connected with the second outer gear ring;
the first double-motor pure electric sub-mode comprises the following steps: the first brake is connected with the first sun gear, and the second brake is connected with the second external gear ring;
the double-motor pure electric second sub-mode: the first brake is connected with the first sun gear, and the first clutch is respectively connected with the first outer gear ring and the second outer gear ring.
The hybrid mode includes:
input power split type stepless speed change drive sub-mode: the second brake is connected with the second outer gear ring;
compound power split type stepless speed change drive sub-mode: the first clutch is respectively connected with the first outer gear ring and the second outer gear ring.
And in the fixed speed ratio mode, the second brake is connected with the second external gear ring, and the first clutch is respectively connected with the first external gear ring and the second external gear ring.
In the pure electric mode, the first brake locks the first sun gear to stop the engine, in the hybrid mode or the fixed speed ratio mode, the second brake locks the second external gear ring, the first clutch controls the first external gear ring and the second external gear ring to synchronously run at a constant speed, the first motor and the second external gear ring synchronously run at a constant speed, and if the second brake and the first clutch simultaneously work, the first motor is locked.
The first mechanical point of the compound power split type stepless speed change drive sub-mode is superposed with the mechanical point of the input power split type stepless speed change drive sub-mode, and for the power split type transmission, the mechanical point refers to a working point that the system does not need to provide electric energy externally, all power of the engine is transmitted to wheels through a mechanical path, and the system efficiency is highest at the moment,
the first mechanical point of the compound power split type stepless speed change driving mode is superposed with the mechanical point of the input power split type stepless speed change driving mode. This mechanical point is exactly the fixed ratio mode of claim 5. At the mechanical point, the change of the rotating speed and the torque before and after the mode switching of the first motor and the second motor is small, so that the control difficulty of the mode switching can be greatly reduced.
The fixed speed ratio mode works at a mechanical point where the compound power split type stepless speed change driving sub-mode and the input power split type stepless speed change driving sub-mode are overlapped.
Compared with the prior art, the invention has the following advantages:
firstly, the mechanical complexity is low: the composite power split type stepless speed change driving system only comprises a first planetary gear set component, a second planetary gear set component, a first brake, a first clutch and a second brake, is simple in structural connection, has relatively few gear shifting elements, and is beneficial to reducing the manufacturing and application cost of machinery.
Secondly, the control difficulty is low: the first mechanical point of the compound power split type stepless speed change drive sub-mode is superposed with the mechanical point of the input power split type stepless speed change drive sub-mode, the mechanical point is just in a fixed speed ratio mode, the working conditions of the first mechanical point and the second mechanical point are overlapped to a certain extent at the mechanical point, mode switching is carried out in a working condition overlapping area, output power interruption is avoided, the change of the rotating speed and the torque of the first motor and the second motor before and after mode switching is very small, and the control difficulty of mode switching is greatly reduced.
And thirdly, multimode: the invention contains three modes of pure electric, hybrid and fixed speed ratio, each mode comprises a plurality of sub-modes, the control modes are multiple, different modes can fully meet the requirements of different driving working conditions, the working point of the engine can be flexibly adjusted, the engine can be ensured to work at the working point with higher efficiency, thereby effectively ensuring the system efficiency, and the problem of secondary energy conversion similar to a series hybrid system does not exist.
Drawings
Fig. 1 is a structural view of one embodiment of a power split hybrid transmission provided by the present invention.
The reference numbers in the figures illustrate:
1. the hybrid power transmission comprises an engine, 2, a first motor, 3, a second motor, 4, a first outer gear ring, 5, a first planet wheel and a first planet carrier, 6, a first sun gear, 7, a second outer gear ring, 8, a second planet wheel and a second planet carrier, 9, a second sun gear, 10, a first brake, 11, a first clutch, 12, a second brake, 13 and a transmission output shaft.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. It is to be understood that only a few preferred embodiments of the present invention have been described, and not all embodiments have been described. Since numerous changes may be made by those skilled in the art based on the principles of the invention, it is not desired to limit the invention to the details shown and described, but rather, it is intended to cover all changes and modifications that fall within the scope of the appended claims.
As shown in FIG. 1 and Table 1, FIG. 1 shows an embodiment of a power split hybrid transmission provided by the present invention, comprising
Double planet row: the planetary gear set comprises a first planetary row and a second planetary row, wherein the first planetary row comprises a first outer gear ring 4, a first sun gear 6, a first planetary gear which is respectively meshed with the first outer gear ring 4 and the first sun gear 6, and a first planet carrier 5 of the first planetary gear; the second planet row comprises a second external gear ring 7, a second sun gear 8, and a second planet gear and a second planet carrier 9 which are respectively meshed with the second external gear ring 7 and the second sun gear 8; the first and second planet carriers are secured to the transmission output shaft 13.
First motor 2 and second motor 3: the first motor 2 is connected with the first outer gear ring 4, and the second motor 3 is connected with the second sun gear 9;
first clutch 11: one side is connected with the first outer gear ring 4, and the other side is connected with the second outer gear ring 7;
an engine 1: is connected with the first sun gear 6;
first brake 10: fixedly connected with the transmission shell and controllably connected with the first sun gear 6;
the second brake 12: fixedly connected with the transmission shell and controllably connected with the second external gear ring 7;
the double planetary rows can realize stepless speed change and continuous change of transmission ratio, so that the matching with the working condition of an engine can reach the optimal state, the fuel economy and the dynamic property of the whole vehicle are improved, and the maneuverability and the comfort are improved. The gear ratio is changed through the double planetary rows, the selection range of the rotating speed of the motor can be widened, and the like, so that the cost of the motor is reduced, and the cost of the power split type hybrid power transmission is further reduced.
In this embodiment, the power split hybrid transmission can be divided into different operation modes according to different energy supplies, and the operation modes of the power split hybrid transmission include: an electric-only mode, in which energy is supplied by the second electric machine 3 alone or by the first electric machine 2 and the second electric machine 3, a hybrid mode, in which energy is supplied by the engine 1 and the first electric machine 2 and the second electric machine 3, and a fixed-speed-ratio mode. In the fixed ratio mode, power may be supplied by the engine 1 alone or by the engine 1 and the second electric machine 3.
In actual use, if a user selects or the whole vehicle hybrid controller automatically controls to shut down the engine and only starts the motor function, the power split hybrid transmission enters a pure electric mode, and if the user selects or the whole vehicle hybrid controller automatically controls to start the engine and start the motor, so that the engine and the motor jointly function, the power split hybrid transmission enters a hybrid mode.
In the electric-only mode, the engine 1 is not operated, but the operation of the first electric machine 2 causes the reverse rotation of the engine 1 and produces a reaction torque that affects the electric machine. Therefore, in the pure electric mode, the first motor 2 can be controlled not to work and is driven by the second motor 3 only through a single motor. In the electric-only mode, the second brake 12 is connected to the second external ring gear 7, and the second ring gear 7 is locked. If the first electric machine 2 is required to be also operated (i.e. to enter the dual-electric-only mode), the first brake 10 is connected with the first sun gear 6, the first sun gear 6 is locked, the engine 1 is also locked, and therefore the situation that the engine 1 rotates reversely, energy loss is caused, and the operation difficulty is reduced is avoided.
According to different actuator combinations, the power split hybrid transmission can work in two double-motor pure electric modes, in a first double-motor pure electric mode, the first brake 10 is connected with the first sun gear 6, the second brake 12 is connected with the second external gear ring 7, in a second double-motor pure electric mode, the first brake 10 is connected with the first sun gear 6, and the first clutch 11 is connected with the first external gear ring 4 and the second external gear ring 7. The two double-motor pure electric modes work in different vehicle speed ranges and different energy transmission paths.
The pure electric mode is mainly used in a low-speed mode, such as starting, urban congestion and low-speed road conditions, and the engine 1 is stopped at the moment, so that energy loss can be effectively avoided and emission can be reduced. Along with the increase of the vehicle speed or the increase of the required driving torque of the whole vehicle, at the moment, the engine 1 needs to participate in energy supply, and the power split type hybrid power transmission needs to be switched to a hybrid power mode or a fixed speed ratio mode. The hybrid mode is classified into an input power split type continuously variable driving mode and a compound power split type continuously variable driving mode. The second brake 12 is connected to the second outer ring gear 7 in the input power split type continuously variable drive mode, and the first clutch 11 is connected to the first outer ring gear 4 and the second outer ring gear 7 in the compound power split type continuously variable drive mode.
The power split hybrid transmission can also work in a fixed speed ratio mode according to the working condition of the whole vehicle or the switching requirement of the hybrid mode; at this time, the second brake 12 is connected to the second external ring gear 7, the second external ring gear is locked at this time, and the first clutch 11 connects the first external ring gear 4 and the second external ring gear 7. Since the first clutch 11 controls the first external gear ring 4 to synchronously operate with the second external gear ring 7 at a constant speed, the first electric machine 2 and the second gear ring 7 synchronously operate at a constant speed, and since the second external gear ring 7 is locked by the second brake 12 at this time, the first electric machine 1 is synchronously locked.
For the power split transmission, the mechanical point of the power split transmission is the working point that the system does not need to provide electric energy externally (namely the electric power in the system is 0), and all the power of the engine is transmitted to wheels through a mechanical path. This mechanical point is exactly the fixed ratio mode of claim 5. At the mechanical point, the working conditions of the first motor 2 and the second motor 3 are overlapped to a certain extent, mode switching is carried out in a working condition overlapping area, no output power interruption exists, and the change of the rotating speed and the torque before and after mode switching of the first motor 2 and the second motor 3 is small, so that the control difficulty of mode switching can be greatly reduced.
TABLE 1 working mode and corresponding working mode table
| Mode of operation | First brake | Second brake | First clutch |
| Single-motor pure electric driving mode | _______ | √ | _______ |
| Double-motor pure electric drive mode 1 | √ | √ | _______ |
| Double-motor pure electric drive mode 2 | √ | _______ | √ |
| Input power split type stepless speed change driving mode | _______ | √ | _______ |
| Compound power split type stepless speed change driving mode | _______ | _______ | √ |
| Fixed ratio drive mode | _______ | √ | √ |
Claims (3)
1. A multi-mode power-split hybrid transmission including a double planetary gear set for connecting an engine (1), a first electric machine (2) and/or a second electric machine (3) to an output shaft, respectively, comprising:
double planet row: the planetary gear set comprises a first planetary row and a second planetary row, wherein the first planetary row comprises a first outer gear ring (4), a first sun gear (6), a first planetary gear and a first planet carrier (5) which are respectively meshed with the first outer gear ring (4) and the first sun gear (6), the second planetary row comprises a second outer gear ring (7), a second sun gear (9), a second planetary gear and a second planet carrier (8) which are respectively meshed with the second outer gear ring (7) and the second sun gear (9), the first planet carrier and the second planet carrier are fixedly connected to a transmission output shaft (13), a first motor (2) is connected with the first outer gear ring (4), and a second motor (3) is connected with the second sun gear (9);
first clutch (11): one side of the first gear ring is connected with the first outer gear ring (4), and the other side of the first gear ring is connected with the second outer gear ring (7);
engine (1): is connected with the first sun wheel (6);
first brake (10): the gear is fixedly connected with a shell of the transmission and is controllably connected with a first sun gear (6);
second brake (12): is fixedly connected with the shell of the transmission and is controllably connected with a second external gear ring (7);
the multi-mode power-split hybrid transmission includes the following operating modes:
pure electric mode: the power is supplied by a second motor (3) or the power is supplied by a first motor (2) and the second motor (3) together, in a pure electric mode, a first brake (10) locks a first sun gear (6) to stop an engine (1), in a hybrid power mode or a fixed speed ratio mode, a second brake (12) locks a second outer gear ring (7), a first clutch (11) controls a first outer gear ring (4) and the second outer gear ring (7) to synchronously run at a constant speed, so that the first motor (2) and the second outer gear ring (7) synchronously run at a constant speed, and if the second brake (12) and the first clutch (11) work simultaneously, the first motor (2) is locked;
the pure electric mode comprises the following steps:
single motor pure electric mover mode: the second brake (12) is connected with the second external gear ring (7);
the first double-motor pure electric sub-mode comprises the following steps: the first brake (10) is connected with the first sun gear (6), and the second brake (12) is connected with the second external gear ring (7);
the double-motor pure electric second sub-mode: the first brake (10) is connected with the first sun gear (6), and the first clutch (11) is respectively connected with the first outer gear ring (4) and the second outer gear ring (7);
hybrid mode: the engine (1), the first motor (2) and the second motor (3) supply energy together;
the hybrid mode includes:
input power split type stepless speed change drive sub-mode: the second brake (12) is connected with the second external gear ring (7);
compound power split type stepless speed change drive sub-mode: the first clutch (11) is respectively connected with the first outer gear ring (4) and the second outer gear ring (7);
fixed ratio mode: the engine (1) can supply power alone or the engine (1) and the second motor (3) can supply power together, under the fixed speed ratio mode, the second brake (12) is connected with the second external gear ring (7), and the first clutch (11) is respectively connected with the first external gear ring (4) and the second external gear ring (7).
2. A multi-mode power-split hybrid transmission including dual planetary gear sets as claimed in claim 1, wherein the first mechanical point of the compound power-split cvt sub-mode coincides with the mechanical point of the input power-split cvt sub-mode.
3. A multi-mode power-split hybrid transmission including dual planetary gear sets as claimed in claim 2, wherein the fixed ratio mode operates at a mechanical point where the compound power-split cvt sub-mode coincides with the input power-split cvt sub-mode.
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| CN108394266B (en) * | 2018-02-09 | 2020-11-20 | 重庆大学 | Power driving system of double-planet-row multi-mode hybrid electric vehicle |
| CN108278337B (en) * | 2018-03-01 | 2020-12-01 | 陈扬珑 | Infinitely continuously shifting speed variator with double-step planet wheel |
| CN109130831B (en) * | 2018-09-07 | 2021-04-27 | 南京理工大学 | Automobile multi-mode hybrid power coupling device |
| CN110303873A (en) * | 2019-06-27 | 2019-10-08 | 江门宇度科技有限责任公司 | A kind of power dividing type hybrid power coupling mechanism and its control method |
| CN112440720B (en) * | 2019-08-30 | 2022-04-15 | 比亚迪股份有限公司 | Hybrid power device and vehicle |
| CN113002286A (en) * | 2021-02-05 | 2021-06-22 | 浙江吉利控股集团有限公司 | Dual-motor hybrid power transmission system and hybrid electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102806837B (en) * | 2011-05-31 | 2015-01-21 | 上海华普汽车有限公司 | Hybrid power transmission and hybrid power transmission system |
| KR101427959B1 (en) * | 2012-12-12 | 2014-08-11 | 현대자동차 주식회사 | Power transmission system of hybrid electric vehicle |
| KR101427960B1 (en) * | 2012-12-12 | 2014-08-11 | 현대자동차 주식회사 | Power transmission system of hybrid electric vehicle |
| DE102015222594A1 (en) * | 2014-11-14 | 2016-05-19 | Avl List Gmbh | Torque transmission device and method for its operation |
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